GitLab

adjust timing on some tests so they don't timeout on small/slow GPUs

This change adds support for multiple concurrent requests, as well as
loading multiple models by spawning multiple runners. The default
settings are currently set at 1 concurrent request per model and only 1
loaded model at a time, but these can be adjusted by setting
OLLAMA_NUM_PARALLEL and OLLAMA_MAX_LOADED_MODELS.

If images aren't present, pull them.
Also fixes the expected responses

This uplevels the integration tests to run the server which can allow
testing an existing server, or a remote server.

This should help CI avoid running the integration test logic in a
container where it's not currently possible.

A simple test case that verifies llava:7b can read text in an image